Method and apparatus for SSD/flash device replacement policy

A non-transitory machine-readable medium having instructions stored therein which, when executed by a processor, cause the processor to perform maintenance operations, the operations comprising:

• determining whether more than a first threshold number of solid-state drives (SSDs) within an array are expected to reach End of Life (EOL) at approximately a same time;
• determining whether all of the more than the first threshold number of SSDs expected to reach EOL at approximately the same time have wear statuses indicating used life indices above a second threshold;
• determining whether the indicated used life indices above the second threshold fall within a range represented by a third threshold, such that the indicated used life indices above the second threshold fall within the range when a highest used life index and a lowest used life index, included within the indicated used life indices above the second threshold, differ by less than or equal to the third threshold;
• determining that a staggered SSD replacement schedule is to be engaged in response to determining that the more than the first threshold number of SSDs expected to reach EOL at approximately the same time have indicated used life indices that are above the second threshold and fall within the range represented by the third threshold;
• determining the staggered SSD replacement schedule for the SSDs for which the staggered SSD replacement schedule is engaged;
• and
• raising replacement alerts according to the determined staggered SSD replacement schedule to prompt a user to replace the SSDs for which the staggered SSD replacement schedule is engaged, wherein the alerts raised advances a replacement schedule time for at least one of the SSDs within the array to avoid the undesired situation where all or a majority of SSDs within the array reach EOL at approximately the same time.

A data processing system, comprising:

• a processor;
• and
• a memory coupled to the processor storing instructions which, when executed by the processor, cause the processor to perform maintenance operations, the operations including:
• determining whether more than a first threshold number of solid-state drives (SSDs) within an array are expected to reach End of Life (EOL) at approximately a same time;
• determining whether all of the more than the first threshold number of SSDs expected to reach EOL at approximately the same time have wear statuses indicating used life indices above a second threshold;
• determining whether the indicated used life indices above the second threshold fall within a range represented by a third threshold, such that the indicated used life indices above the second threshold fall within the range when a highest used life index and a lowest used life index, included within the indicated used life indices above the second threshold, differ by less than or equal to the third threshold;
• determining that the staggered SSD replacement schedule is to be engaged in response to determining that the more than the first threshold number of SSDs expected to reach EOL at approximately the same time have indicated used life indices that are above the second threshold and fall within the range represented by the third threshold;
• determining the staggered SSD replacement schedule for the SSDs for which the staggered SSD replacement schedule is engaged;
• and
• raising replacement alerts according to the determined staggered SSD replacement schedule to prompt a user to replace the SSDs for which the staggered SSD replacement schedule is engaged, wherein the alerts raised advances a replacement schedule time for at least one of the SSDs within the array to avoid the undesired situation where all or a majority of SSDs within the array reach EOL at approximately the same time.